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Particle model, elements, compounds, mixtures and separation

Atomic structure and periodicity · Lesson 1 of 5

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Lesson 1 of 5 · Atomic structure and periodicity

Particle model, elements, compounds, mixtures and separation

3 quick checks≈3% of the testFoundational

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By the end you’ll be able to

describe the arrangement, movement and relative energy of particles in solids, liquids and gases using the particle model
distinguish between an element, a compound and a mixture in terms of particles, bonding and composition
identify representations of atoms, molecules, elements, compounds and mixtures from words, formulae and particle diagrams

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apply knowledge of melting point, boiling point, solubility and particle size to choose and explain suitable separation methods, including filtration, crystallisation, simple distillation, fractional distillation, evaporation and chromatography

interpret chromatograms and other simple separation results to determine the number of substances present and comment on purity where appropriate

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